package io.github.dunwu.javacore.jdk8.misc;

/**
 * @author Benjamin Winterberg
 */
public class Math1 {

	public static void main(String[] args) {
		testMathExact();
		testUnsignedInt();
	}

	private static void testMathExact() {
		System.out.println(Integer.MAX_VALUE);
		System.out.println(Integer.MAX_VALUE + 1);

		try {
			Math.addExact(Integer.MAX_VALUE, 1);
		} catch (ArithmeticException e) {
			System.err.println(e.getMessage());
		}

		try {
			Math.toIntExact(Long.MAX_VALUE);
		} catch (ArithmeticException e) {
			System.err.println(e.getMessage());
		}
	}

	private static void testUnsignedInt() {
		try {
			Integer.parseUnsignedInt("-123", 10);
		} catch (NumberFormatException e) {
			System.out.println(e.getMessage());
		}

		long maxUnsignedInt = (1L << 32) - 1;
		System.out.println(maxUnsignedInt);

		String string = String.valueOf(maxUnsignedInt);

		int unsignedInt = Integer.parseUnsignedInt(string, 10);
		System.out.println(unsignedInt);

		String string2 = Integer.toUnsignedString(unsignedInt, 10);
		System.out.println(string2);

		try {
			Integer.parseInt(string, 10);
		} catch (NumberFormatException e) {
			System.err.println("could not parse signed int of " + maxUnsignedInt);
		}
	}

}
